After sanding down the base of the outpost, I stuck on four posts for roof with an adjoining beam between them. Then taking a piece of foam board and slicing it in half to reduce the thickness, I stuck in some corrugated card on top.
I decided to leave this until tomorrow to paint and work on the landscape.
Taking some insulation board and cutting some lengths to build up the height, using filler along the edges.
The bottom layer is going to be a river and I've ordered the stuff to make it but if it doesn't arrive on time then I'll turn this into a road. The brick wall will go on the middle level and the outpost will be placed on top level.
Filler was used around the edges of the base to cover up the layers of foam board. While the filler is drying, first coats of paint have been applied to the brick wall and Outpost.
https://richardscreativeworkshop.co.uk/tiger-force-outpost/